The annual calendar is undoubtedly one of the most useful complications, since it takes account of the essential calendar irregularities over a full year. Contrary to simple calendars programmed for 31-day months and requiring date corrections almost every two months, the mechanical programming of the annual calendar enables it to handle months of both 30 and 31 days. This means it requires adjustment just once a year in order to cope with the specific vagaries of the month of February. Already remarkable in its own right, this complication is associated in the new Quai de l’Ile model with a retrograde date display, an acknowledged Vacheron Constantin speciality. The new 326-part Vacheron Constantin Calibre 2460 QRA drives the hours, minutes and small seconds at 9 o’clock, as well as the annual calendar with retrograde date display, months and a high-precision moon-phase indication requiring correction just once every 122 years.The Quai de l’Ile Retrograde Annual Calendar is delivered with two straps: one in black or brown alligator leather, and the other in black or brown rubber, secured by an 18K pink gold

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